/*************************************************************************

 *

 * $Id: trionan.h,v 1.9 2005/03/27 18:52:45 breese Exp $

 *

 * Copyright (C) 2001 Bjorn Reese <breese@users.sourceforge.net>

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF

 * MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND

 * CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.

 *

 ************************************************************************/

#ifndef TRIO_TRIONAN_H

#define TRIO_TRIONAN_H

#include "triodef.h"

#ifdef __cplusplus

extern "C" {

#endif

#if !defined(TRIO_PUBLIC_NAN)

# if !defined(TRIO_PUBLIC)

#  define TRIO_PUBLIC

# endif

# define TRIO_PUBLIC_NAN TRIO_PUBLIC

#endif

enum {

  TRIO_FP_INFINITE,

  TRIO_FP_NAN,

  TRIO_FP_NORMAL,

  TRIO_FP_SUBNORMAL,

  TRIO_FP_ZERO

};

/*************************************************************************

 * Dependencies

 */

#if defined(TRIO_EMBED_NAN)

/*

 * The application that trionan is embedded in must define which functions

 * it uses.

 *

 * The following resolves internal dependencies.

 */

# if defined(TRIO_FUNC_ISNAN) \

  || defined(TRIO_FUNC_ISINF)

#  if !defined(TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT)

#   define TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT

#  endif

# endif

# if defined(TRIO_FUNC_NAN)

#  if !defined(TRIO_FUNC_PINF)

#   define TRIO_FUNC_PINF

#  endif

# endif

# if defined(TRIO_FUNC_NINF)

#  if !defined(TRIO_FUNC_PINF)

#   define TRIO_FUNC_PINF

#  endif

# endif

#else

/*

 * When trionan is not embedded all all functions are defined.

 */

# define TRIO_FUNC_NAN

# define TRIO_FUNC_PINF

# define TRIO_FUNC_NINF

# define TRIO_FUNC_NZERO

# define TRIO_FUNC_ISNAN

# define TRIO_FUNC_ISINF

# define TRIO_FUNC_ISFINITE

# define TRIO_FUNC_SIGNBIT

# define TRIO_FUNC_FPCLASSIFY

# define TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT

#endif

/*************************************************************************

 * Functions

 */

/*

 * Return NaN (Not-a-Number).

 */

#if defined(TRIO_FUNC_NAN)

TRIO_PUBLIC_NAN double

trio_nan

TRIO_PROTO((void));

#endif

/*

 * Return positive infinity.

 */

#if defined(TRIO_FUNC_PINF)

TRIO_PUBLIC_NAN double

trio_pinf

TRIO_PROTO((void));

#endif

/*

 * Return negative infinity.

 */

#if defined(TRIO_FUNC_NINF)

TRIO_PUBLIC_NAN double

trio_ninf

TRIO_PROTO((void));

#endif

/*

 * Return negative zero.

 */

#if defined(TRIO_FUNC_NZERO)

TRIO_PUBLIC_NAN double

trio_nzero

TRIO_PROTO((TRIO_NOARGS));

#endif

/*

 * If number is a NaN return non-zero, otherwise return zero.

 */

#if defined(TRIO_FUNC_ISNAN)

TRIO_PUBLIC_NAN int

trio_isnan

TRIO_PROTO((double number));

#endif

/*

 * If number is positive infinity return 1, if number is negative

 * infinity return -1, otherwise return 0.

 */

#if defined(TRIO_FUNC_ISINF)

TRIO_PUBLIC_NAN int

trio_isinf

TRIO_PROTO((double number));

#endif

/*

 * If number is finite return non-zero, otherwise return zero.

 */

#if defined(TRIO_FUNC_ISFINITE)

TRIO_PUBLIC_NAN int

trio_isfinite

TRIO_PROTO((double number));

#endif

#if defined(TRIO_FUNC_SIGNBIT)

TRIO_PUBLIC_NAN int

trio_signbit

TRIO_PROTO((double number));

#endif

#if defined(TRIO_FUNC_FPCLASSIFY)

TRIO_PUBLIC_NAN int

trio_fpclassify

TRIO_PROTO((double number));

#endif

#if defined(TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT)

TRIO_PUBLIC_NAN int

trio_fpclassify_and_signbit

TRIO_PROTO((double number, int *is_negative));

#endif

#ifdef __cplusplus

}

#endif

#endif /* TRIO_TRIONAN_H */